Pipe-coupling.



L. D. HUBBARD.

PIPE COUPLING.

APPLICATION FILED MAR.20,1913.

1,094,332-, Patented Apr. 21, 1914.

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-UMEIA PLANDGRAPH co., wAsHxNm'oN. D. C.

WTE@ STATES PFENT GFElCE.

LEMOTT I). HUBBABJD, 0F CHICAGO, ILLINOlS.

PIPE-COUPLING.

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To @ZZ whom, it' may concern Be it known that l, Lntio'r'r D. HUBBARD, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented new and useful Improvements in Pipe-Couplings, of which the following is a specification.

This invention has reference to pipe couplings, and it proposes, briefly, an improved device of the character specified which is designed for connecting together two lengths or sections of pipe in suoli a way as to produce the requisite tight joint, the improvements in question relating primarily to the construction of the coupler proper.

The invention is especially applicable to stove pipes, and will be hereinafter described in that connection, and an embodiment thereof illustrated in the accompanying drawing, but it is to be understood that no limitation to that precise use is contemplated.

In said drawing :-Figure 1 is a fragmental side elevation of two sections of stove pipe connected together by the improved coupler; Figs. 2 and 3 are transverse sections taken on lines 2-2 and 8 3, Fig. 1 and showing the coupler unlocked and locked, respectively, the inner pipe being omitted in both instances; and Fig. e is a perspective view of the coupler, the locking part of which is shown as detached from the band part or member.

Referring more particularly to the drawing, 5 and 6 indicate, respectively, the telescoped outer and inner pipe sections to be coupled together. The latter section is of the usual character, but the former is split longitudinally from end to end and is provided adjacent one of its split edges with a continuous longitudinal lip 7 which is arranged upon the inner face of said section, and is here shown as constituted by a separate metal strip. This strip has its body portion olfset slightly from its inner longitudinal edge, which latter is secured to said pipe section, thereby providing a pocket 8 that is designed to receive the opposite longitudinal edge of the said section under the action of the hereinafter-described locking part of the coupler. Both sections are ordinarily constructed of metal having more or less inherent resiliency, and, hence, the split section normally tends to expand, and is contracted by means of the coupler, so as to grip the other or inner section, with Specification of Letters Patent.

Application filed March 20, 1913.

Patented Apr. 2i, 1914s.

Serial No. 755,755.

the requisite degree of tightness. Preferably, however, the coupler is applied to one end of the aforesaid split section, the edges of that section being fastened together at the other end thereof by fitting the terminal of one edge in the pocket 8 and then passing a rivet through the parts thus interfitted.

rlhc coupler proper is preferably constituted by a tapered metal band 9 which encircles one end of the outer or split pipe section and is riveted or otherwise suitably secured thereto, the ends of the band being left free, as will be understood from Figs. 2 and 3. The larger end of the band is forked, as indicated by the numeral 10, the terminals 11 of the fork arms being bent outwardly and backwardly. The small end of said band is adapted to fit in the space between the fork arms, and its terminal 12 is bent similarly to the aforesaid terminals 11, such construction producing, in effect, a series of three hooks, of which two are formed on the fork arms and the third on the small end of the band. As the band, also, is constructed of resilient metal, it is necessary to provide means for drawing its ends inwardly and toward each other, to contract the outer pipe section, and, also, for locking said ends in such position. This is preferably attained by a cam lever 13, shown in detail in Fig. t, said lever having a somewhat cruciforin shape. ts long arm 14 constitutes its operating portion or handle, and is slightly bowed to conform to the curvature of the pipe section; its short arm 15 is provided with an opening 16, which permits its engagement with hook 12; while its two cross-pieces 17, located at the intersection of the arms 14 and 15, are engaged with the fork hooks 11. The inoperative, or open position of said lever is represented in F ig. 2, and, as shown therein, it projects laterally outward from the pipe section, when in such position; but when swung downwardly and inwardly toward said section, into its closed or operative position, (depicted in Fig. 3), it will draw the forked end of the coupler band inwardly past the other end of said band and, at the same time, will draw the corresponding edge of said section into pocket S, thus contracting said section about the inner section and, in consequence, effecting the connection between the sections.

To hold the lever in closed position, its

long arm 14e, adjacent the free end thereof, is provided with a not-ch i8 which is designed to receive the hooked end 19 of a locking tongue 20 provided on the tapered end portion or" band 9 and formed by slitting that portion and then bending the member produced by the slitting operation. Accordingly, assuming that the lever has been moved from open to closed position and, during such movement, has drawn the free edge of the expansible section into pocket 8, it is only necessary, in order to lock said lever in the latter position, to engage the hooked end 19 oit tongue 20 in its notch 1S, whereupon the connection of the two pipe sections will be maintained until said lever is opened.

l claim l. The combination, with a split pipe section; of a band encircling said section; means connected with the ends of said band for drawing the saine toward each other; and a spring retaining member provided upon said band adjacent one end thereof for releasable engagement with said drawing ieans, to lock the latter in operating position.

The combination, with a split pipe section; of a band encircling said section and provided with terminal hooks; a member connected with said hooks for drawing' the ends oit said band toward each other, said member hav' i0 a notch formed therein; and a member provided upon said band and engageable in said notch for locking the first named member in operative position.

3. The combination, with a split pipe section provided along one or" its split edges with a pocket for the reception of the othei' edge; of a band encircling said section; a neinber connected with the ends ot said band for drawing the saine toward each other, to force the second-named edge of said section into said pocket, said member having a notch formed therein; and a spring tongue provided upon said band and engageable in said notch for locking the rst-nained member in operative position.

et. rihe combination, with a split pipe section; of a. band encircling said section; a

cani lever connected with the terminals of said band for drawing the same together, and having a notch formed therein; and a spring tongue pr vided upon said band and arranged for engagementin said notch to lock said lever in operative position.

5. The combination, with a split pipe section; oia band encircling said section and having one ot its ends larger than lthe other,

the larger end being formed with a terminal fork, the arms oi which are hooked, the smaller end having a terminal hook which is adapted to tit in the space between said fork arms; and a cam lever for drawing the band ends together having an opening wherein the tion; of a band encircling said section and having one of its ends larger than the other, the larger end being formed with a terminal fork, th-e arms of which are hooked, the smaller end having' a terminal hook which is adapted to i'it in the space between said fork 75 arms; a cam lever for drawing the band ends together having an opening in one end wherein the second-named hook is engaged, a notch in its other end, and a pair of crosspins intermediate its ends and engaged with the hooked fork arms; and a resilient inember arovided upon said band and arranged for engagement in said notch, to lock said lever in operative posit-ion.

ln testimony whereof I have hereunto setmy hand in presence of two subscribing witnesses.

Yi/VILLIAM H. ALLEN, ARTHUR LYNCH.

Gentes of this patent may be obtained for vc cents each, by addressing the Commissioner of Patents, Washington, D. G. 

